A network consists of the following activities. The activity times $($duration$)$ are given in weeks.

$\backslash$table$[[$Activity$,\backslash$table$[[$Predecessor$],[$Activities$]],$Duration$],[$A$,--,9],[$B$,$A$,2],[$C$,$A$,12],[$D$,$A$,5],[$E$,$B$,6],[$F$,$B$,8],[$G$,$C$,$ F$,3],[$H$,$D$,2],[$I$,$H$,8],[$J$,$G$,$ I,$6],[$K$,$E$,$ J$,2]]$

a$.$ Draw a network diagram that links these activities according to the predecessor relationship.

b$.$ Which activities form the critical path$/$s$?$ Use the critical path method $($CPM$)$ approach.

c$.$ Calculate the slack values for all the activities $($A to K$).$

d$.$ What is the duration of the critical path$/$project$?$